Properties of Rocks and Soils See also." 875247 875038 Geotechnical properties of sediment cores from the Southeastern Yellow Sea: effects of depositional processes Lee, H J; Chough, S K; Jeong, K S: Han. S J Marine Geotechoi VT. N1. 1987. P37-52 Twenty sediment cores were taken from scattered offshore and nearshore locations in the Yellow Sea. Water content, bulk density, void ratio, porosity, shear strength, Atterberg limits, and carbonate content were measured. Relations between geotechnical properties within each of the groups (offshore, nearshore) were statistically determined using factor analysis. Results indicate that geotechnical properties of the cores show some common characteristics indicative of depositional processes. 875039 Relationships between the geological and selected geomechanical properties of the Purbeek-Weald facies in CantabHa (Northern Spain) Tomillo, C; Foyo, A Q J Engng Geol V20, N2. 1987, P177-182 Visual examination and petrographic, chemical and X-ray analyses were used to identify rocks from three potential reservoir sites in the Purbeck-Weald facies. Uniaxial compression, point load, and Brazilian tests were used to classify mechanical properties. Three units were distinguished, calcareous sandstones, siliceous sandstones and lutites. Their presence and distribution were explained in terms of the geological history of the area. 875O40 Characterization of seabed rocks for mine planning in the EEZ Cruikshank, M H; Paul, R C Proe 18th Offshore Technology Conference, Houston, 5-8 May 1986 I,'3, P135,145. Publ Richardson. Texas. OTC, 1986 Hard rock crustal deposits on the sea bed are important resources. Primary information required for their exploitation is crust thickness and strength, adhesion of the crust to the substrate and the roughness of crust and substrate surfaces. Dredged samples of manganese bearing, hyaloclastite, and phosphoritic crusts were recovered. Test specimens were prepared and non-destructive and destructive tests carried out. The limited data obtained are within the range of that previously reported. Possible seabed mining methods are suggested, based on these results. The need to develop suitable in situ testing capabilities and to improve present sampling and coring techniques is emphasised.
discussed. The need for a compre~.ensJ~c stud.', of the c.,.chc behaviour of soils is also emphasised and rcstt~'s are presented from on-going research programs. The appl!,:ation of gct~physical techniques in the exploratton and ex,r~ct~on aspec~,~ of natural gas. oil. lignite, and otl shale is de:,:nbed 875042 Acoustical properties of a kaolinite related to its engineering properties Jakhanwal, M P; Singh. R B: Stngh. L P Proc International Conference on Construction in Glacial Tills and Boulder Clays, Edinburgh, 12-14 March 1985 P103-112. Publ Edinburgh: Engineering Technics Press. 1~ ~'5 The ultrasonic monitoring tnaxial apparatus (UMTA) is described, which can be used to simultaneousl.~ measure the P ~,ave acoustic and geotechnical properties of specimens under test. Laboratory prepared silt-clay samples contzining 0-100% kaolinite clay were examined in the UMTA. Results show the relationships between P wave velocity and effective cell pressure, bulk compressibility, void ratio and static Young's modulus. Matrix composition has a definite effect on acoustico-geotechnical properties. 875043 BEMEK rock tester - a field and laboratory instrument for strength and elastic parameter testing of rock Roshoff, K Proc International Symposium on Engineering in Complex Rock Formations, Beijing, 3-7 November, 1986 P63-69. Pub/ Beijing" Science Press. 1986 The BEMEK rock tester, which is suitable for laboratory or field use, allows simple, accurate, and rapid measurement of a wide range of strength and elasticity properties of rock. By combining 2, 3. and 4 point loading on a specimen, the following tests are possible: fracture toughness test, four point bending of the rock core to determine Young's modulus and Poisson's ratio, point load test, uniaxial compression test and Brazilian test. 875044 Data base system and evaluation of mechanical properties of rock Imazu, M Proc International Symposium on Engineering in Complex Rock Formations, Beijing, 3-7 November, 1986 P111-I20. Publ Beijing: Science Press. 1986 The R O C K B A N K data base has been developed to collect and correlate laboratory and field measured mechanical properties of rocks and rock masses. It can be usefully applied in the conceptual stages of underground cavern design.
Composition, structure texture and density 875045 Practical guidelines for microwave drying of soils. Technical note Carter, M; Bentley. S P Can Geotech J V23. N4. Not" 1986, P598-601
87504 1 Geotechnical aspects of resources development in Thailand Balasubramanian, A S; Bergado, D T; Handali, S; Lee, Y H Proc 8th Southeast Asian Geoteehnical Coaference, l(uala Lumpur, 11-15 March 1985 112. P62-78. Publ Kuala Lumpur: • Practical guidelines are presented for the use of a microwave Organising Committee, 1986 oven in drying soil samples to determine moisture content. Geotechnical problems experienced in natural resources devel- Results are based on over 250 tests on sand, sandy clay. estuaopment and the development of alternative energy sources in rine clay, marl, lateritic clay, kaolin, and bentonite. All soils Thailand are presented. The use of a large oedometer to mea- tested can be placed into one of three groups, and drying times sure compressibility and compaction parameters of fill materi- for each are presented as a function of initial sample mass. als for the construction of several earth and earth-rock dams is Results are within 0.5% of those from a standard drying oven 4 1987 Pergamon Journals Ltd. Reproduction not permitted